After putting out a kitchen fire in an upscale townhouse, Casey, Herrmann, Mouch, Cruz, Otis and Mills find themselves accused of stealing a $50,000 diamond necklace from the home, touching off an internal investigation. Cruz’s brother Leon is caught in the middle of an escalating gang war, leaving Cruz to make a desperate choice to save him. Meanwhile, Dawson invites Casey to her cousin’s fancy Christmas party, and a frustrated Shay has reached her limit with Severide.

Recap

The episode begins with Cruz arriving at Flocko’s layer and asking him hand over Leon to him. Flocko says he can’t do that till Cruz hands over $10,000 to him. Cruz says he doesn’t have the money. Flocko removes a gun and shoots Leon; just then Cruz wakes up from his nightmare. Cruz then meets Leon outside the station. Cruz has called him there. He tells Leon how worried he is about the serious gang business in the neighborhood. Leon counters by asking Cruz to pay the 10k to Flocko, so he can get out. “But you don’t go 10 grand right? So why are we still talking?” Leon asks. Leon asks Cruz to stay out of his business, so he doesn’t get beaten up again because of Cruz. ..